On Wed, May 25, 2016 at 11:06:35AM +0100, Harvey Hunt wrote: > On certain MIPS32 devices, the ftrace tracer "function_graph" uses > __lshrdi3() during the capturing of trace data. ftrace then attempts to > trace __lshrdi3() which leads to infinite recursion and a stack overflow. > Fix this by marking __lshrdi3() as notrace. Mark the other compiler > intrinsics as notrace in case the compiler decides to use them in the > ftrace path. Makes perfect sense - but I'm wondering how you triggered it. Was this a build with the GCC option -Os that is CONFIG_CC_OPTIMIZE_FOR_SIZE? Usually people build with CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE that is -O2 which results in intrinsics being inlined. Ralf
